IAG Wave Spring Kit For 2131 Fuel Rails, 2004-2006 STi

The IAG Performance Wave Spring Kit for IAG-AFD-2131 Fuel Rails are intended to be utilized with Injector Dynamics ID1000/1300cc fuel injectors. The four springs when installed create tension on the lower injector collars keeping them firmly place which reduces o-ring wear and potential leaks.

Included:
• IAG Wave Spring Kit for 2131 Fuel Rails with ID1000/1300 Injectors